Amanani akwiphepha lakho leglasi anxulumene nokuma kwamehlo akho kunye namandla okubona kwakho. Anokukunceda uqonde ukuba unayo na ukubona kufutshane, ukubona izinto kude okanye i-astigmatism — kwaye ukuya kuthi ga kwinqanaba elingakanani.
Ukuba uyazi into omawuyikhangele, ungayiqonda intsingiselo yamanani kunye nezifinyezo ezikwitshathi yakho yemithi.
I-OD vs. OS: Inye ngeliso ngalinye
Oogqirha bamehlo basebenzisa izifinyezo ezithi “OD” kunye nethi “OS” ukubonisa iliso lakho lasekunene nelasekhohlo.
● Igama elithi OD liliso lakho lasekunene. Igama elithi OD lifutshane nelithi oculus dexter, ibinzana lesiLatini elithetha “iliso lasekunene.”
● I-OS liliso lakho lasekhohlo. I-OS lifutshane nelithi oculus sinister, ngesiLatini lithetha “iliso lasekhohlo.”
Iresiphi yakho yombono isenokuba nekholamu ebhalwe "OU." Esi sisifinyezo sei-oculus uterque, okuthetha "amehlo omabini" ngesiLatini. La magama afinyeziweyo aqhelekile kwimiyalelo yeglasi, iilensi zokunxibelelana kunye namayeza asetyenziswa emehlweni, kodwa abanye oogqirha kunye neekliniki bakhethe ukuphucula amayeza abo asetyenziswa emehlweni ngokusebenzisaRE (iliso lasekunene)kwayeLE (iliso lasekhohlo)endaweni ye-OD kunye ne-OS.
I-Sphere (SPH)
I-Sphere ibonisa ubungakanani bamandla eelensi amiselweyo ukulungisa ukubona okukufutshane okanye ukubona okukude. Amandla eelensi alinganiswa ngee-diopters (D).
● Ukuba inani elingaphantsi kwesi sihloko liza nophawu lwe-minus (–),ubona izinto ezikufutshane.
● Ukuba inani elingaphantsi kwesi sihloko linophawu lokudibanisa (+),ubona kude.
Isilinda (CYL)
Isilinda sibonisa ubungakanani bamandla eelensi afunekayoi-astigmatismIhlala ilandela amandla e-sphere akwiphepha leglasi.
Inombolo ekwikholamu yesilinda inokuba nophawu lwe-minus (lokulungisa i-nearsighted astigmatism) okanye uphawu lwe-plus (lokujonga kude).
Ukuba akukho nto ibonakalayo kweli kholamu, mhlawumbi awunayo i-astigmatism, okanye inqanaba lakho le-astigmatism lincinci kangangokuba akufuneki lilungiswe.
I-Axis
I-Axis ichaza i-lens meridian engenamandla esilindai-astigmatism echanekileyo.
Ukuba umyalelo weglasi yeliso uquka amandla esilinda, kufuneka uquke ixabiso le-axis, elilandela amandla esilinda.
I-axis ichazwa ngenani ukusuka ku-1 ukuya kwi-180.
● Inani elingu-90 lihambelana ne-meridian ethe nkqo yeliso.
● Inani eliyi-180 lihambelana ne-meridian ethe tye yeliso.
Yongeza
"Yongeza" yintowongeze amandla okukhulisaIsetyenziswa kwinxalenye esezantsi yeelensi ze-multifocal ukulungisa i-presbyopia — ukubona kude kwendalo okwenzeka xa umntu ekhula.
Inani elivela kweli candelo leresiphi lihlala liyi-"plus" power, nokuba awuboni phawu lwe-plus. Ngokubanzi, liya kuba phakathi kwe-+0.75 ukuya kwi-+3.00 D kwaye liya kuba li-power efanayo kuwo omabini amehlo.
I-Prism
Eli lixabiso lamandla e-prismatic, alinganiswa kwii-prism diopters ("pd" okanye unxantathu xa ubhalwe ngesandla), amiselwe ukuhlawulaukulungelelaniswa kwamehloiingxaki.
Yipesenti encinci kuphela yemiyalelo yeglasi yamehlo equka umlinganiselo weprism.
Xa ikhona, ubungakanani beprism buboniswa kwiiyunithi zesiNgesi ze-metric okanye ze-fractional (umzekelo, i-0.5 okanye i-½), kwaye ulwalathiso lweprism luboniswa ngokuqaphela indawo ehambelanayo "nesiseko" sayo (umphetho otyebileyo).
Izifinyezo ezine zisetyenziselwa ulwalathiso lweprism: BU = isiseko phezulu; BD = isiseko ezantsi; BI = isiseko ngaphakathi (ngasempumlweni yomntu onxibeyo); BO = isiseko ngaphandle (ngasendlebeni yomntu onxibeyo).
Ukuba unomdla ongakumbi okanye ufuna ulwazi oluthe kratya malunga neelensi zamehlo, nceda ungene kwiphepha lethu ngokusebenzisahttps://www.universeoptical.com/stock-lens/ukuze ufumane uncedo olungakumbi.